STANDARD MEDIUM FOR LOCAL CO2-CORROSION LABORATORY TESTING
UDC: 622.692.4.076:620.193/.197
DOI: 10.33285/0207-2351-2022-1(637)-28-32
Authors:
The results of laboratory experiments are presented, in which the essential features of corrosion processes occurring in real oilfield systems are simulated – a high rate of local corrosion, exceeding the corrosion rate by 2...9 times. A standard environment and conditions for laboratory experiments are proposed, which make it possible to reproduce visible and measured with a needle micrometer (> 0,01 mm) local corrosion damage on samples of corrosion control by the gravimetric method. The protective effect of corrosion inhibitors in relation to local carbon dioxide corrosion at the selected dosage is proposed to be assessed not by the magnitude of the protective effect, but by the presence or absence of local corrosion on the samples of corrosion control by the gravimetric method after the end of the test. It is shown that with a high protective effect of corrosion inhibitors in relation to corrosion rate, there may be no protective effect in relation to local corrosion.
Keywords: corrosion, localized corrosion, CO2-corrosion, laboratory testing, corrosion medium, corrosion inhibitors
Annotation:
MARKIN ANDREY N.
1,
TKACHEVA VALERIYA E.2
1 Nizhnevartovsk branch of Federal State Budget Educational Institution of Higher Education Industrial University of Tyumen, Nizhnevartovsk, Russia
2 RN-BashNIPIneft, Ufa, Russia
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